| Taken T22 as the experimental material , set four treatments such as 1.0m rowspacing, single row planting(A), 1.25m row spacing ,single row p!anting(B),2.0mrow spacing, wide-narrow row planting(C), 1.50m row spacing, wide-narrow rowplanting(D),used the "1 ton sucrose per 667m2 field "cultivation, the experimentwas done with the agronomic characters, field ecological factors, physiologyfactors and economical characters being measured. The results were as followed.1. All of the four treatments improved the temperature and humidityenvironment of the sugarcane ecosystem , enhanced the system's temperature0.5-1.5 C during the last tillering stage and initial extension, reduced0.5-1.0'Cduring the peak extension, and enhanced the system's temperature0.1-0.5 C during the mature stage, so that the temperature of the systembecame more suitable for sugar cane plant to grow during all stages. The fourtreatments can enhance the system's humidity 5-15% during the early stages,and 10-15% during the later stages for the sugar cane plant in the systems toresist the drought, and grow more easily. One of the way the " 1 ton sucroseper 667m2 field" ecosystem affecting the sugarcane plants' growth wasregulating the system's temperature and humidity to affect the metabolism ofsome nutrient elements such as P, K, Fe, Cu, Zn, Ca inside the sugarcane plant and the variation of some physiological factors such as net photosynthesis rate, transpiration rate, leaf temperature, stomatal conductance of sugar cane leaves.2. Except D treatment's temperature between plants significantly higher than the other three treatments during the last tillering stage ,the difference of the row middle temperature and temperature between plants among the four treatments was not significant during the other stages. But the daily average row middle temperature, temperature between plants and up-ground temperature was C>D>B>A, the temperature increased by the row spacing. The under-ground temperature of D treatment was higher than the other treatments, and A treatments lower during all stages. So it can be concluded that, treatment of different planting structure has some effect on the sugarcane ecosystem's temperature, but did not caused significant difference.3. Excepting the daily average row middle humidity of A treatment was significantly higher than the other treatments during the peak extension , and soil water of A treatment was higher than the other treatments during the last extension ,the difference of row middle humidity during the other stages, the humidity between plants during all stages, and the soil water of other stages among the four treatments was not significant. But ,except of the last tillering stage the humidity of row middle and between plants of A were obviously higher than C, during all stages. The soil water of B and D were alsoobviously higher than A and C during all stages. So it can also be concluded that, the treatment of different planting structure has some effect on the sugarcane ecosystem's humidity,but did not caused significant difference.4. The difference of the row middle transmittance among the four treatments during the early stages was evident. Transmittance of C,B,D significantly higher than A during thelast tillering stage, C significantly higher than the other treatments during the initial extension, and C still obviously higher than the other treatments during the peak extension .D's row middle transmittance is relatively low during the initial and peak extension. The difference of the row middle transmittance during the later stages among four treatments and the difference of transmittance between plants during all stages among four treatments were not significant. So it can be concluded that the treatment of different planting structure caused obvious difference of row middle transmittancy during the early stages and had relative little effect on transmittancy of row middle during the later stages and transmit...
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